8121799 has 12 divisors (see below), whose sum is σ = 9566424. Its totient is φ = 6874224.

The previous prime is 8121793. The next prime is 8121811. The reversal of 8121799 is 9971218.

It is not a de Polignac number, because 8121799 - 2⁷ = 8121671 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8121793) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3069 + ... + 5065.

It is an arithmetic number, because the mean of its divisors is an integer number (797202).

Almost surely, 2^8121799 is an apocalyptic number.

8121799 is a deficient number, since it is larger than the sum of its proper divisors (1444625).

8121799 is a wasteful number, since it uses less digits than its factorization.

8121799 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2094 (or 2087 counting only the distinct ones).

The product of its digits is 9072, while the sum is 37.

The square root of 8121799 is about 2849.8770148903. The cubic root of 8121799 is about 201.0098837578.

The spelling of 8121799 in words is "eight million, one hundred twenty-one thousand, seven hundred ninety-nine".